Thought about it, I think the first time I programmed properly was at about 16 or 17. Although I did get past Hello World in my original forays at a much younger age, 14 or so.

I think the significance of me getting into programming was that it started just about as soon as I found out what any of these programming languages are. Originally it was QBASIC (or QuickBASIC, one of those), but moved to C++ as soon as I heard it was considered a professional language (because BASIC, bless it, doesn't appear as particularly professional even to a dewy-eyed adolescent).

I think my skill is probably related to the time I've put in, rather than my age. Age, however, has made me better and better at avoiding accidentally derailing a thread for 4 pages. :P Or maybe that's related to the time I've been on message boards?